Spring-tooth cultivator



(No Model.)

J. H. FOUNTAIN. SPRING TOOTHGULTIVATOR.

No. 427,066. y Patented May 6,1896.

WITNESSES A A device attached thereto.

UNITED STATES ATENT OFFICE.

JOHN H. FOUNTAIN, OF ORESOO, MICHIGAN.

SPRING-TOOTH CULTIVATO-R.

SPECIFICATION forming` part of Letters Patent No. 427,066, dated May 6, 1890.

Application led October 16, 1889. Serial No. 327,237. (No model.)

To all whom it may concern:

Be it known that I, JOHN H. FOUNTAIN, a

citizen of the United States, residing at Cef resoo, in the county of Oalhoun and State of Michigan, have invented a new and useful Improvement in Spring-Teeth Oultivators, of which the following is a specification.

This invention relates to cultivators, and has forits object the production of an attachment to cultivator-teeth, by means of which the angle at which the tooth enters t-he ground may be changed whenever the tooth comes in contact with a resisting substance greater than that of the earth which is under culti# vation.

In the drawings, Figure l shows a side View of one bar of the cultivator-frame with my Fig. 2 shows a top view of my spring attachment.

A is a longitudinal beam forming part of the frame of a cultivator. B is a support hinged or pinned to the bar A at C, and having the cultivator-tooth or blade-iron D attached to its lower end.

E and F are the two parts of an extensible link, and of these E is a U-shaped bar pinned to the supportB at G, and F is a single bar or rod passing through an aperture at the end e of the U-shaped piece E, and is hinged or pinned to the bar A at I-I and carries at the other end a cross-head J, which is movable along the branches of the U-shaped piece E, and is also movable along the rod F, but is held from escaping from the rod F by means of the screw and nut K and 7.1.

S is a spring interposed between the crosshead J and the inner side of the end e of the U-shaped piece E.

The rod F is of proper lengt-h to extend the entire distance from the pin H to the support B when the support B is in proper position with respect to the beam A to work most efficiently.

The spring S, interposed between the crosshead J and the end e of the U-shaped piecev E, pulls the support B forward until it is stopped by the end of the rod F, but allows the support B to be drawn backward until the coils of the spiral spring, coming together, form a stop to its further motion in that direction, and the spring and its supports are of such a length that when the support B is in its extreme rearmost position the shovelblade D will slip over any obstruction.

The combination of parts forming the linkage between G and H, being pinned or hinged at both G and H, readily assume. a position with the angles between the link and the support B, and between the link and the frame A much more acute than they are when all parts are in the position for efficient work.

It can readily be seen that an expansionspring could be used in place of t-he compression-spring.

A plate I, attached to the support B at the place where the rod F abuts against it, prevents the wearing away of the support B at that place.

By means of the nut 7c, on the end of the rod F, thecross-head J may be pushed forward and the tension of the spring S changed as may be desirable.

Having thus explained my invention, what I claim as novel, and desire to have secured to me by Letters Patent, is

The combination, with the beam and the support B, pivoted thereto and carrying the.

tooth D, of the U-shaped bar E, pivoted to the support B near its lower end, the rod F, passed through the end of the bar E and pivotally secured at its upper end to the beam, the cross-head J on the rod F within the bar E and guided by the parallel portions of said bar, the nut 7c on the rod below the cross-head, and the spiral spring around the rod F, between the cross-head and the end e of the U- shaped bar, substantially as shown and described.

JOHN H., FOUNTAIN Witnesses:

C. H. VARY, EFFIE I. Cnorr. 

